Ministratrix of said uriah townsend



(No Model.) U. TOWNSEND, D'ecd.

A. A. .1 Townsnnn, Administratrix. I COMBINATION CENTER SQUARE.

No. 580,91 N. V Pa/nan *dAp Jvzvenior:

E norms PETERS 00.. mare-Limo" WASHINGTON. nxc,

UNITED STATES PATENT OFFICE.

URIAI-I TOWNSEND, OF ROCHESTER, NEIV YORK, ASSIGNOR OF ONE-HALF TOTHOMAS A. LOTTRIDGE, OF SAME PLACE; ASENETH A. TOIVNSEND AD-MINISTRATRIX OF SAID URIAI-I TOIVNSEND, DECEASED.

COMBINATION CENTER-SQUARE.

SPECIFICATION forming part of Letters Patent No. 580,910, dated April20, 1897.

Application filed November 25, 1895. Serial No. 570,087. (No model.)

To all whom it may concern.-

Be it known that I, URIAH TOWNSEND, of Rochester, in the countyof Monroeand State of New York, have invented a new and useful Improvement inCombination-Squares, which improvement is fully set forth in thefollowing specification and shown in the accompanying drawings.

My invention is a combination tool or device which I have styled asquare or combination-square, it consisting of a metal blade of uniformthickness and preferably parallel sides and a holder for the blade. Theplan and construction of the device are such that by its use the centerof a circular disk or piece may be quickly found, as, for instance, thecenter of the end of a cylindrical body, as a round shaft; also, thecenter of a square or' an octagonal body or shaft may be found by itsuse. The device is also useful in drawing miter-lines, and serves thepurpose equally well as a try-square or T-square.

The invention is hereinafter more fully described and particularlypointed out.

2 5 Referring to the drawings, Figure 1 is a side elevation or plan ofmy improved combination-square, a part being broken away; Fig.

2, the reverse side of the same with a part of the holder broken awayand sectioned on the dotted line 2 2 in Fig. 3. Fig. 3 is a longitudinalsection of the handle on the dotted line 3 3 in Fig. 1, seen asindicated by the arrow pointed thereon. Fig. lis a view of the edge ofthe holder, seen as indicated by ar- 3 5 row 4 in Fig. 1, parts beingbroken away.

As to the parts of the device shown, A is a blade of sheet metal,preferably steel, having a spring temper.

B is a holder for the blade, which may be of metal or wood, to which theblade is rigidly secured by rivets or other simple fasteners a, passingthrough both parts. The blade is preferably inserted in a longitudinalkerf b at the middle plane of the holder, as shown 5 in Fig. 3.

The holder is formed with a handle B and a large angular notch orV-shaped opening 0 at the side opposite the handle, the angle 0' ofwhich notch. or opening is preferably made ninety degrees. The size ofthis angle is, however, a matter of choice or of use to which the toolis to be put. For instance, if the angle 0 were either obtuse or acuteit would answer all the purposes for which the tool is intended exceptto draw miter-lines or for finding the centers of square or octagonalbodies. In any case, whatever may be the size of the angle 0 the bladeis so inserted that its working edge d accurately bisects the angle, asshown. The blade is formed with a laterally- 6o projecting arm A, theinner face of which, with the straight edge of the blade, forms anangular notch or opening 0, corresponding to one-half of the opening 0in the holder, the angles of the two notches being placed to correspond,as shown in Fig. 2. The edge dof the blade being placed to bisect theangle in the holder, the short side f of the blade will coincide withthe adjacent face f of the holder.

In case the holder is made of soft material, as wood, I provide it witha metal cap or facing e at the angle, as shown, for the purpose ofproviding it against abrasion and wear where mostsubjected thereto. Thiscap or facing piece is accurately formed to correspond with the opening0, the sides or facesf f of the angle being plain surfaces meeting in adiedral angle at c, the planes of the two faces being at right angleswith the plane of the blade. The end faces g g of the cap or piece 6 aremade with a considerable surface, so that if the tool be used largely asa T-square or a try-square those surfaces will not wear away so as torender the tool inaccurate, said faces being held against the edge ofaboard, for instance, for the purpose of squaring.

The metal cap e when used is formedwith a strengthening-web is, whichoccupies a corresponding cavity in the holder and through which thefasteners a pass to hold said cap firmly both to the holder B and theblade.

As shown, the tool is alike on both sides, so that it may be held ineither hand when being used. The blade is provided at either 5 side witha zero-line h in exact line with the two end faces g g of the holder,the plane of these faces being at right angles with the Working edge clof the blade, and, if found convenient, the edge d may be graduated toconform to a scale of equal parts.

As a matter of convenience, the handle B of the holder is locateddirectly opposite the apex of the notch C, so that the square can beused either side up or as a try-square Without inconvenience, as thehandle lies in aline with the inner edge of the blade, and it may beprovided with a hole 71 for the purpose of hanging the tool on a nail orother support.

As sl1own,the blade A and the handle B of the device extend in oppositedirections from the opening C-that is to say, are on opposite sides ofsaid opening.

What I claim as my invention is 1. A combination-square consisting of ablade and holder therefor, the latter being formed with a handle, and atthe opposite side with an angular opening, one edge of the bladebisecting the angle of said opening, the blade being provided with alaterally-projecting arm, the inner edge of which, with the straightedge of the blade, forms an angular opening corresponding to one-half ofthe opening in the holder, one side of which opening in the bladecoinciding With one side of said opening in the holder, the blade beingimmovable in the holder, substantially as shown and described.

2. A combined square comprising aholder, one side of which is providedWith a V-shaped notch and a transverse groove or kerf, the ends of thesides formed by the notch being cut off to form two surfaces on a linewith each other, and the opposite side of the holder is provided with ahandle directly opposite the apex of the notch, and a blade with anextension secured in the kerf of the holder so as to bisect the notch,and having its surface provided with a zero-line in exact line with theends of the sides, substantially as set forth. In Witness whereof I havehereunto set my hand, this 21st day of November, 1895, in the presenceof two subscribing Witnesses.

URIAH TOWNSEND.

\l itnesses:

Enos B. XVHITMORE, M. L. lVINsToN.

